Rolling blind.



E. OAHILL.

v ROLLING'BLIND. APPLICATION FILED MAY 9, 1913.

Patented Dec. 16, 1913.

t ouuu have invented certain '0 both extend EDWARD GAHILL, 055 NEW YORK, N. Y.

ROLLING BLINIL memes.

Specification of Letters Patent.

PatentedDec. 16, 1913.

Application filed May 9, 1911s. Serial No new.

T 0 all whom it mm concern:

Be it known that I, EDWARD CAHILL, a citizen of the United States, residing at New York, in the county and State of New York,

new and useful Improvements in Rolling Blinds, of which the following is a full, clear, and exact specification.

This invention relates to fireproof rolling blinds, and especially to the construction of the slats and theirinterlocking connection with one another. 1

The principal object of the invention is to provide a slat for such blinds or doors which is at the same time simple in construction, inexpensive to manufacture, durable, easily operated, and from the interlocking joints of which rain will be absolutely excluded.

Another object is to provide a blind or door of this kind in which the weight is evenly divided on each side of the vertical center of the interlocking joints of the slats, whereby the device will normallyhang true and not sag or cause undue strain on the joints.

A further object 1s to provlde an interlocking joint for the slats which is very strong by reason of its shape and also because the outer portion of the joint is reinforced by the inner portion thereof.

The invention will be first hereinafter described in.connection with the accompanying drawings, which constitute a part of this specification, and then more specifically pointed out in the clalms at the end of the description.

In the accompanying drawings, in which similar reference characters are used throughout the several views to indicate corresponding parts: Figure 1 is a broken outside elevation of two interlocked slats of a rolling curtain constructed in accordance with the present invention, and Fig. 2 is a transverse vertical section of the same.

Each slat may be the counterpart of the others making up the blind or door, and may consist of a single piece of sheet steel or other suitable metal or fireproof material. The body portion A of each slat is bowed with its convex side presented to the outside. This bowed body portion extends in a continuous curve or arc from the upper interlocking part or bead B to the lower interlocking part or box C. The bead B and box outwardly from the points where they are joined to the body portion.

'ing the joint. The contacting In other words, the bead and box both extend in the same direction as the central part of the body from the bends or angles where said head and box join said body. Furthermore, the outermost surfaces of said head and box lie substantially. in the vertical lane of the central portion of body, so t at the weight of the blind when hanging is evenly divided on either side of the center of the interlocking joints, as clearly shown by the broken line in Fig. 2. The interlocking portion or bead B at the upper edge of each slat starts from the body A in a sharp bend I). Just above said bend, there is a substantially vertical portion 6. From the upper margin of this vertical portion, the metal is bent or rolled to substantially circular form in cross section, the edge being brought in to a position just in front of and spaced slightly away from the vertical portion I). Said rolled portion 11 it will be observed, is bent or turned first outward, then downward, then inward, and finally upward.

The box or lower interlocking portion C is generally angular in cross section. forming said box, the lower marginal portion of the slat is first bent outward from the body A in a sharp bend c to form an upper inclined face 0; thence in another sharp bend downward to form an outer substantially vertical face 0 thence inward in another sharp bend to form a lower substantially horizontal face 0 and finally upward in a curve conforming to the curvature of the portion 6 of the bead. The sharp bends at the upper and lower edges of the outer face 0 are designated 0 and 0*, respectively.

When the head on one slat is interlocked with the box on the next slat above it, as

illustrated, the upper inclined face 0 and outer vertical face 0 will shed water, preventing rain or other moisture from entersurfaces of said bead and box will, therefore, be protected from rust and will always work freely in rolling up or letting down the blind or door. It will also be observed that the faces or flattened portions 0 and c are reinforced against denting and other injury by the bead fitting snugly wi hin the box. The bowed portion of each slat extends from one of its interlocking portions to the other and has a radius greater than half the distance between said interlocking portions. When the blind is rolled up, the flat face I) will come in contact with the interior of the inclined portion 0 and the curvature or convexity of the body of one slat will form substantially a, continuation of the curvature or convexity of the body of the adjacent slat, whereby the blind may be rolled into very compact condition.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. A rolling blind comprising a plurality of interlocking slats or sections, each hav- 7 ing a head which is generally circular in cross-section fitting within a generally angular box on the adjacent slat or section, said box having a curved upwardly extending inner wall spaced from its upper wall a distance less than the diameter of the bead, said head adapted to engage the inner walls of said box on all four sides in the rolled as well as the unrolled state of the blind.

2. A rolling blind comprising a plurality of interlocking slats or sections, each having an outwardly extendlng head which is generally circular in cross-section fitting within an outwardly extending generally angular 7 box on the adjacent slat or section, said box having an upper downwardly and out- 3. A slat for rollin blinds, comprising a A body havmg outwar ing members at its opposite edges, one of said members consisting of a vertical portion and a curved portion extending first outward, then downward, then inward and then upward, forming substantially a complete circle in cross section terminating adjacent to but spaced away from said vertical portion, the other member consisting of an upper outwardly and downwardly inclined portion, a horizontal portion 0on nected to said vertical portion by a sharp bend and extending inwardly, and an upwardly curved portion conforming to the curved portion of the first member and of a size to slidably fit between the same and the vertical portion of said first member.

In testimony whereof 'I have signed my name to this specification in the presence of two attesting witnesses.

EDWARD CAHILL. Witnesses Momus R. DELANY,

PIERRE M. CLEAR.

3' Xtending interlock- 

